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Android app for performing Yubikey Neo NFC challenge-response
YubiChallenge is an Android app that provides a simple, low-level interface for performing challenge-response authentication using the NFC interface of a Yubikey Neo. This app should be triggered using an implicit intent by any external application wishing to perform challenge-response. The intent name should be "com.yubichallenge.NFCActivity.CHALLENGE" and the challenge should be stored in an extra called "challenge". The response will be returned by the intent in an extra called "response".
NFC is a scalable, distributed chat server and client implemented in Java. Notable features include built in load balancing and HTTP-tunneling support. Using the load balancing, a distributed network of servers can be formed, similar to an IRC network.